Yeah, I'm 6'6"/200lbs and loving them (in 175). The OP does have 40lbs on me, but the new AXs don't feel at all soft to me - just a hint of welcome compliance when the terrain gets a little roughed up. I didn't get to try the previous version, but by a few recent accounts here, the new ones are stiffer. I'm reasonably sure they can handle a stronger and/or heavier skier than me. Besides, I doubt ANY Stockli (at least in their Laser line-up) could really be called all out SOFT.
If still in doubt, the 183 is even more ski - but I suspect the fun factor will start taking a hit, unless one is super agressive.